Trailer dump body



May 9, 1950 v. LUNDELL TRAILER DUMP BODY 2 Sheets-Sheet 1 Filed Jan. 8, 1946 INT? WWW WWUITIWTUITIWE I uz'cutor May 9, 1950 v. LUNDELL 2,507,169

TRAILER DUMP BODY Filed Jan. 8, 1946 2 Sheets-Sheet 2 $772072 ZZUZdeZZ,

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Patented May 9, 1950 UNITED STATES PAINT GEFICE 2 Claims.

The invention as described herein and illustrated in the accompanying drawings, consists of a trailer, an object of which is to provide a dump body on a trailer chassis.

Another object of the invention is to provide a hydraulic dump for a trailer body.

A further object of this invention is to provide a truck body pivotally connected to a trailer chassis and an inclined trackway depending from the body through means of which the body may be raised and dumped of its load.

A still further object of the invention is the provision of means whereby a trailer body may be hydraulically raised to dumping position and gravity means for lowering the same, said hydraulic means acting to retard too rapid down movement.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure l is an elevational view of the dump trailer shown in dumping position,

Figure 2 is a bottom plan view thereof,

Figure 3 is a. longitudinal sectional view thereof shown in normal position,

Figure 4 is a detail of a hitch, and

Figure 5 is a plan view as seen from line 5-5 of Figure 1.

While one embodiment of the invention is illustrated in the above referred to drawings, it is to be understood that they are merely for the purpose of illustration and that various changes in construction may be resorted to in the course of manufacture in order that the invention 2 be utilized to the best advantage according to circumstances which may arise, without in any way departing from the spirit and intention of the device, which is to be limited only in accordance with the appended claims. And while there is stated the primary field of utility of the in vention it remains obvious that it may be employed in any other capacity wherein it may be found applicable.

In the accompanying drawings, and in the following specification, the same reference charac ters are used to designate the same parts and elements throughout and in which the numeral l0, refers to the invention in its entirety and H, indicates a trailer chassis to the rear terminals ll, of the side irons l3, which are pivotally mounted as at M, the depending bearings l5, being fixed to the rear portion I3, of a truck body I1.

Fixedly mounted to the underside 18, of the body are the upper ends l9 and 20, of a pair of track members 2! and 22, which incline down in a rearward direction, the lower ends 23 and 24, of which are held fixed by braces 25, 26, 21 and 28. Operating upon said tracks 2| and 22, are wheels 29 and 3|], rotatable on the ends 3| and 32, of a shaft 33, upon which is mounted a tube 34, within which the shaft 33, is rotatable. The ends 3! and 32, are supported upon the upper ends 35 and 33, of arms 37 and 3B, the lower ends 39 and 45, of which are fixed to a transverse bar 4!, the ends 42 and 43, of the bar being pivotally mounted in bearings 44 and 45, depending from said chassis.

The tube 34, is provided with a centered extension 46, braced by fins 41 and 48, and into which the end 49, of a piston rod 5!], is fixed. The rod 50, is actuated by a piston 5|, within the cylinder 52, fixedly secured at 53, to the cross iron 54, of the chassis H. A draw bar 55, is fixed to the forward end 55, of the chassis and to which is attached an eye 51, whereby the trailer may be attached to a truck or tractor.

From the above specification it will be seen that through forcing fluid into the end 58, of the cylinder 52, through port '59, connected in any suitable manner to a pressure source, the shaft 33, of the lift 60, will be forced up causing wheels 29 and 30, to ride tracks 2! and 22, which action will push the body ll, up to its dumping position as shown in Figure l of the drawings. Upon release of pressure in the lower end of the cylinder the weightof the truck body will cause it to lower by gravity as the fluid escapes.

From the foregoing specification it will become apparent that the invention disclosed will adequately accomplish the functions for which it has been designed and in an economical manner and that its simplicity, accuracy and ease of operation are such as to provide a relatively inexpensive device considering what it will accomplish and that it will find an important place in the art to which it appertains when onc placed on the market.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described the invention that which is claimed to be new and desired to be procured by Letters Patent is:

1. In a trailer chassis having a pair of spaced longitudinal side members interconnected by a transverse bar at their forward ends, a hoisting mechanism comprising a body hinged to the forward ends of said side members, a hydraulic lift comprising a. cylinder pivoted to said transverse bar, a piston in said cylinder having a piston rod 4 said cylinder, and spaced arms terminally secured to said transverse bar and said axle.

2. The combination of claim 1 wherein said tracks are inclined downwardly and rearwardly of said body relative to said hydraulic lift.

VERNON LUNDELL.

REFERENCES CITED The following references are of record in the extending therefrom, inclined tracks depending :0 file of this patent;

from said body and located between the pivots of said body and said cylinder, an axle carried by the outer end of said piston rod, wheels on said axle engaging said tracks, a transverse bar ro- UNITED STATES PATENTS 

